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3022
Determine the total number of pi (π) and sigma (σ) bonds present in a benzene molecule.
Benzene (C6H6) consists of a hexagonal ring of six carbon atoms. Each carbon is bonded to one hydrogen atom via a sigma bond (6 total) and to two adjacent carbons via sigma bonds (6 total), totaling 12 sigma bonds. The alternating double bonds contribute three pi bonds, as each double bond consists of one sigma and one pi bond. Thus, the structure contains 12 sigma bonds and 3 pi bonds.
3023
Only sigma bonds are present in__________________?
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Hydrogen bonding occurs when a hydrogen atom is bonded to a highly polarized atom, like nitrogen, oxygen, or fluorine. Among the given options, ethanol (C2H5OH) has a hydrogen atom bonded to an oxygen atom, enabling it to form hydrogen bonds. Ethane (C2H6) and chloroethane (C2H5Cl) do not exhibit hydrogen bonding, and methane (CH3OCH3) only has a single hydrogen bond, not the two required for significant hydrogen bonding properties.
Propene is an alkene with the general formula C3H6. It does not exhibit cis-trans isomerism because it is a symmetric molecule. Geometric isomerism is also not possible in propene as it does not have a double bond with restricted rotation. Hence, propene does not exhibit any type of isomerism mentioned in the options.
3026
Pi bonds are produced by overlapping of__________________?
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3027
Which of the following processes involves the addition of hydrogen molecule across carbon-carbon multiple-bond?
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3028
Which of the following is not an unsaturated hydrocarbon?
C5H12 is a saturated hydrocarbon, whereas the other options are unsaturated hydrocarbons. Unsaturated hydrocarbons have one or more double bonds between carbon atoms, whereas saturated hydrocarbons have only single bonds.
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3030
What is the hybridization of the nitrogen atom in pyridine?
Pyridine is a planar, aromatic molecule, and the nitrogen atom is part of the aromatic ring. Its hybridization is Sp2, which allows for the formation of three bonds and is consistent with the molecule's planarity and aromaticity.
